On the west side the border curved southward from the hill facing Beth-horon on the south and came out at Kiriath-baal (that is, Kiriath-jearim), a city of the sons of Judah. This was the western side.
KJV
And the border was drawn [thence], and compassed the corner of the sea southward, from the hill that [lieth] before Bethhoron southward; and the goings out thereof were at Kirjathbaal, which [is] Kirjathjearim, a city of the children of Judah: this [was] the west quarter.
ASV
And the border extended thence, and turned about on the west quarter southward, from the mountain that lieth before Beth-horon southward; and the goings out thereof were at Kiriath-baal (the same is Kiriath-jearim), a city of the children of Judah: this was the west quarter.